FESOM-2.6.10 failing test

[mandresm]

Our tests for fesom-2.6.10 is failing. The script is from @ackerlar: /work/ab0246/a270124/esm-experiments/awiesm-2.6/LIG/test05/scripts/fesom2.6-levante-reference.yaml

Possibly related issues/PRs:
#1200
#1303

Last change before it stop working was the update of version 2.6 repo tag from 2.6.7 to 2.6.10:
628e218#diff-1512205a9ac3b1918e0a2b69781064050b6cbeb9e39832f84f9b3d88b70fec37L28